Parents and partners Repayment Advanced Learner Loan. Turn on thread page Beta Toggle. A2 Chemistry Coursework Help watch. Starting uni is full of surprises: Start new discussion Reply. Follow 1 What is the best method to determine the amount of copper in a 2 pence coin? For this I will use: Gravimetry, Redox Titration and Colorimetry.
For the Gravimetry, i have written that I will react the copper II sulphate with the zinc powder until it displaces it colorless and will then add sulphuric acid to react with any remaining zinc. I was just wondering once you have drained off the zinc sulphate what method would you use to dry until constant mass?
Could i use a crucible? Follow 2 AS and A-Level chemistry resources thread. This forum is supported by: Can't stop stealing other girls' boyfriends. GF never initiates sex.
Grow your Grades Replies: Personal Statement Advice Replies: Secondary school, sixth form and FE college Replies: Advice on everyday issues Replies: IT and technology Replies: Count to a million Part 31 Started by: I want to know what calculations can I do in my analysis??? I have no idea and i desparately need some help!!!
I was confused about this and i don't know whether my data is conductance or conductivity because the meter is too old and it only displays the unit mS. I need to be a bit careful in answering questions about coursework becaus eof the rules about help.
However, I can give some general help. The main thing with conductimtric titrations is that pure water has a very low ability to conduct electricity because it has very few ions present. Acids and alkalis have a much better conductivity because they ahve lots of ions present. Let's assume you are adding acid to an alkali.
Once you are past the end point, the ions don't get used up anymore and so the conductivity increase. So you could plot a graph of the conductivity against the volume of acid added and find wher there is a kink in the graph to show the end point. Which board are you studying for? This does not appear on the spec with whcih I am familiar so I will need to check some details to make sure that I am giving good advice.
I have a feeling but only that, so don't quote me yet! As I said, I will check and get back to you. Long term coursework usually comes with some briefing notes etc so have another chack through that, if you have it. Thanks for your help! I've checked quite a lot of websites and they said conductance and conductivity are two things but generally they didn't explain how to define them.
The conductivity meter that I used only said mS as the unit so which is right? I am on OCR salters for chemistry,and I chose this investigation myself becasue I thought it would be interesting,but it turns out quite confusing. Unfortunately I don't have any notes or whatsoever, all the things I know is from internet.
I am currently doing the analysis for a [strong acid weak alkali] and a [weak acid strong alkali]conductimetric titration, can you give me some hints? I have just dug out my university chemistry textbook Physical Chemistry written by Peter Atkins, in case you want to reference it. He doesn't use the word conductance in this book at all but see later.
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I need to be a bit careful in answering questions about coursework becaus eof the rules about help. However, I can give some general help. The main thing with conductimtric titrations is that pure water has a very low ability to conduct electricity because it has very few ions present. my coursework title is: What is the best method to determine the amount of copper in a 2 pence coin? For this I will use: Gravimetry, Redox Titration and C.